SU1239731A1 - Integrating device - Google Patents

Abstract

The invention relates to computing. The device contains an operational amplifier 1, the feedback circuit of which includes an integrating capacitor 5 and a large-scale resistor 3. A resistor voltage divider of resistors 4 and 43 is connected to the output of the amplifier, between the middle output of which and the non-inverting input of the operational amplifier bottom resistors 6. The common output of two adjacent resistors through the corresponding storage capacitor 7 is connected to the bus of zero potential. A single integral from the amplifier output goes to the integrating links formed by resistors 6 and capacitors 7 and then to the input of amplifier 1, creating at its output a signal equal to cyN & i.e. a signal of a single approximate integration and further to n-fold, which ensures high accuracy integration. 1 il. from $ W to with UD sj with

Description

one

The invention is intended for use in radio networks, in particular in analog computing.

The purpose of the invention is to increase the accuracy of integration and the expansion of the frequency range.

The drawing shows a diagram of the integrating device.

The device contains an operational device 1 with the first 2 and second 3. large scale resistors, a resistor divider voltage across resistors 4. and 4, an integrating capacitor 5, charging resistors, and storage capacitors 7, - ,,

Integrating. Device works as follows.

The changing input signal causes current to flow in resistor 2 and a voltage appears at the output of operational amplifier 1, which is approximately proportional to the one-time integral of the input signal, which is provided by switching on the capacitor 5. This signal from the output of amplifier 1 through the voltage divider is fed to the integrating links formed resistors 6 and capacitors 7, in each of which a voltage is formed that is approximately proportional to the n-fold integral. These voltages, with corresponding weighting coefficients, increasing with increasing integration multiplicity, arrive at the non-inverting input of operational amplifier 1, creating at its output a signal equal to the sum of a single approximate integration signal plus a double approximate integration signal and so on up to a multiple. This sum provides a high accuracy of one-time integration of the proposed integrator. The stability of the device is provided by a voltage divider, the stability is determined by the scale resistors 2 and 3.

The transfer function of the integrator when using double integration is determined by

one

expression 1 P PY

A Ra, T + Pb, +

K (P)

where P is the operator;

Кр Rj / Rg (the ratio of large-scale estradiography);

1239731

A 1 1) is the depth of positive feedback; Rd-transfer attenuator; a, s / a cjr, / a

(Cc-e condenser grade 5); C, K, g / A;

r / l / a

b, r (t - p), / A;

B g, -c / a.

Since the coefficients a ,, b, of the polynomials of the transfer function contain independent variables, it means that the transfer function K (P) can be corrected while maintaining the effect of multiplying the capacitance and using only one operational amplifier.

The use of the invention allows to increase the accuracy of integration and to expand the frequency range of integration.

Formula 5

An integrating device containing an operational amplifier, the inverting input of which through the first large-scale resistor is connected to the input

integrating device, parallel connected second scale resistor and integrating capacitor connected between inverting input and output of an operational amplifier, as well as n storage capacitors and n series-connected charging resistors, common output of every two series-connected charging resistors

A corresponding storage capacitor is connected to a zero potential bus, different from the fact that, in order to improve the integration and expansion of the frequency range, a resistive voltage divider connected between the output of the operational amplifier and the zero potential bus is not talked into,

the voltage is connected to the free output of the first of n series-connected: charging resistors, the free output of the last of which is connected to a non-inverting input

the operational amplifier and through the corresponding cumulative condenser - with a tire of zero potential.

Claims (1)

Claim 25. An integrating device comprising an operational amplifier, the inverting input of which through the first scale resistor is connected to the input 30 of the integrating device, a second scale resistor and an integrating capacitor connected in parallel between the inverting input and output of the operational amplifier, as well as η storage capacitors and η series-connected charging resistors, are connected in parallel , the common output of each two series-connected charging resistors through 40 corresponding storage capacitor Op is connected to zero potential bus, wherein e c i in that, to improve the accuracy of integration and expansion chastot45 Nogo range, it introduced a resistive voltage divider connected between the output of the operational amplifier and the tire ground potential, the average output resistor divider ₅₀ is coupled voltage to the free output of the first of η series-connected: charging resistors, the free output of the last of which is connected to the non-inverting input _{55 of the} operational amplifier and through the appropriate voltage an auxiliary capacitor - with a bus of zero potential.